[quote=So Boerd]
So Russia nukes Berlin, Rome, London, Paris and Madrid, but makes no preparations for a strike on the US. US strike or no?
[/quote]

Understand that the scenario is virtually impossible -- Yes. Because a nuclear deterrent that doesn't react, isn't a deterrent. In this situation Russia has made the calculation that they can fire nuclear weapons with impunity, a calculation which we must prove catastrophically wrong, for the sake of every human being on the planet. In this situation, we have to destroy not only the Russian government and military, we have to destroy the [i]concept itself[/i] that a nation can conduct such a nuclear strike and get away with it.